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Leonard D. Soubier and Everett C. Shuman received US Patent No. 2,787,345 on April 2, 1957, filed November 19, 1952.
The patent's description opens (from the scanned text):
This invention relates to the production of structural units, such as redoors, and in particular to a type of unit having an initially high resistance to heat and fire and which resistance increases with a rise in temperature and reaches a maximum under actual subjection to tire land/ or high temperatures. ln most lire resistant units, whether wood or steel clad, the structure and core material utilized Will provide a maximum temperature resistance before break down and without any change or conversion of the material which will increase that maximum ...
- Author
- Leonard D. Soubier; Everett C. Shuman
- Published by
- US Patent Office
- Series
- US Patent No. 2,787,345
- Date
- April 2, 1957
- Library no.
- ACL Doc 22309 · asbestosclaims.law/library/22309
- Rights
- US government work, in the public domain.
Read or download
Read online Download the PDF PDF · 6 pages · 610 KB
Where it was listed
- Asbestos, May 1957, in its patents department (the year's issues)
Cite this document
Leonard D. Soubier, Everett C. Shuman. “Fire resistant structural units (US Patent 2,787,345, 1957).” April 2, 1957. US Patent No. 2,787,345. US Patent Office. AsbestosClaims.Law Library, ACL Doc 22309. https://asbestosclaims.law/library/22309.
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